<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			*{
				padding: 0;
				margin: 0;
			}
			img{
				width: 150px;
			}
			.box{
				height: 150px;
				/*水平居中*/
				text-align: center;
				padding-top: 50px;
				background-color: rgba(99, 132, 175, 0.3);
			}
			body{
				background-image:url(images/2.jpg) ;
			}
		</style>
	</head>
	<body>
		<div class="box" style="">
			<img src="images/1.jpg" />
			<img src="images/2.jpg" />
			<img src="images/3.jpg" />
			<img src="images/4.jpg" />
			<img src="images/5.jpg" />
		</div>
		
		<script type="text/javascript">
			window.onload = function() {
				var images = document.getElementsByTagName("img");
				for (var i = 0; i < images.length; i++) {
					images[i].onclick = function() {
						//this代表当前设置点击事件的对象images[i]
						var image = this.src;
						//豆豆加加
						//document.body.style.backgroundImage = "url(images/5.jpg)";
						document.body.style.backgroundImage = "url(" + image + ")";
					}
				}
			}
		</script>
	</body>
</html>
